"Initial setting" means a process to initialize the process control parameters in order to keep the targeted tone based on the behavior (before aging-degradation) of a new development unit, new developer, and a new drum.
It’s essential for a machine to perform "Initial settings" correctly at the initial installation or at replacement of a development unit, developer, or drum.
If not, the machine cannot perform the process control correctly and wrong image density (too thin or thick) / toner scattering could occur.